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Persistent pollutants in a salmon population (Salmo salar) of the southern Baltic Sea

Larsson, Per LU ; Backe, Cecilia LU ; Bremle, Gudrun LU ; Eklöv, Anders LU and Okla, Lennart LU (1996) In Canadian Journal of Fisheries and Aquatic Sciences 53(1). p.62-69
Abstract
Persistent pollutants in an Atlantic salmon (Salmo salar) population spawning in a river of southern Sweden were investigated. The population was characterized by a high growth rate. Some males reached 20-30 kg after 3 to 4 years in the sea. The fat content of migrating salmon varied by one order of magnitude and was the most significant correlate of pollutant concentrations. No relationships were recorded between fat content and gender, age (weight, length), year at sea, or different measures of condition. The reasons for this may be the varied evolutionary strategies for maximizing reproductive output; male salmon may enter the spawning river as small grilse and spawn opportunely, or migrate at a larger size, when they can hold spawning... (More)
Persistent pollutants in an Atlantic salmon (Salmo salar) population spawning in a river of southern Sweden were investigated. The population was characterized by a high growth rate. Some males reached 20-30 kg after 3 to 4 years in the sea. The fat content of migrating salmon varied by one order of magnitude and was the most significant correlate of pollutant concentrations. No relationships were recorded between fat content and gender, age (weight, length), year at sea, or different measures of condition. The reasons for this may be the varied evolutionary strategies for maximizing reproductive output; male salmon may enter the spawning river as small grilse and spawn opportunely, or migrate at a larger size, when they can hold spawning territories in the river. Females have a greater and more uniform size, and spend more energy on gonadal products. The varying fat content of individual fish may also be attributed to foraging in different areas of the Baltic and thereby to migration distances as well as foraging strategies. When pollutant levels were normalized for fat content, other factors such as age (weight, length) were shown to be important for uptake; older fish had higher levels of pollutants than younger ones (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Canadian Journal of Fisheries and Aquatic Sciences
volume
53
issue
1
pages
62 - 69
publisher
National Research Council Canada
external identifiers
  • scopus:0029728821
ISSN
1205-7533
DOI
10.1139/cjfas-53-1-62
language
English
LU publication?
yes
id
a11e22e3-62ec-4eef-942e-80b558d0c81e (old id 8163929)
date added to LUP
2015-11-04 13:03:53
date last changed
2017-07-30 03:43:32
@article{a11e22e3-62ec-4eef-942e-80b558d0c81e,
  abstract     = {Persistent pollutants in an Atlantic salmon (Salmo salar) population spawning in a river of southern Sweden were investigated. The population was characterized by a high growth rate. Some males reached 20-30 kg after 3 to 4 years in the sea. The fat content of migrating salmon varied by one order of magnitude and was the most significant correlate of pollutant concentrations. No relationships were recorded between fat content and gender, age (weight, length), year at sea, or different measures of condition. The reasons for this may be the varied evolutionary strategies for maximizing reproductive output; male salmon may enter the spawning river as small grilse and spawn opportunely, or migrate at a larger size, when they can hold spawning territories in the river. Females have a greater and more uniform size, and spend more energy on gonadal products. The varying fat content of individual fish may also be attributed to foraging in different areas of the Baltic and thereby to migration distances as well as foraging strategies. When pollutant levels were normalized for fat content, other factors such as age (weight, length) were shown to be important for uptake; older fish had higher levels of pollutants than younger ones},
  author       = {Larsson, Per and Backe, Cecilia and Bremle, Gudrun and Eklöv, Anders and Okla, Lennart},
  issn         = {1205-7533},
  language     = {eng},
  number       = {1},
  pages        = {62--69},
  publisher    = {National Research Council Canada},
  series       = {Canadian Journal of Fisheries and Aquatic Sciences},
  title        = {Persistent pollutants in a salmon population (Salmo salar) of the southern Baltic Sea},
  url          = {http://dx.doi.org/10.1139/cjfas-53-1-62},
  volume       = {53},
  year         = {1996},
}